arm64/xen: Fix implicit declaration of function ‘grub_file_filter_disable_compression

[Lee Jones <lee.jones@linaro.org>]

From: Lee Jones <lee.jones@linaro.org>

arm64/xen: Fix implicit declaration of function ‘grub_file_filter_disable_compression
    
Without this fix, building xen_boot.c omits:
    
loader/arm64/xen_boot.c:433:5: error: implicit declaration of function ‘grub_file_filter_disable_compression’; did you mean ‘grub_file_filter_unregister’? [-Werror=implicit-function-declaration]
     grub_file_filter_disable_compression ();
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     grub_file_filter_unregister
loader/arm64/xen_boot.c:433:5: error: nested extern declaration of ‘grub_file_filter_disable_compression’ [-Werror=nested-externs]

Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/grub-core/loader/arm64/xen_boot.c b/grub-core/loader/arm64/xen_boot.c
index 33a855df4..5820412e8 100644
--- a/grub-core/loader/arm64/xen_boot.c
+++ b/grub-core/loader/arm64/xen_boot.c
@@ -391,7 +391,6 @@ grub_cmd_xen_module (grub_command_t cmd __attribute__((unused)),
 
   struct xen_boot_binary *module = NULL;
   grub_file_t file = 0;
-  int nounzip = 0;
 
   if (!argc)
     {
@@ -399,13 +398,6 @@ grub_cmd_xen_module (grub_command_t cmd __attribute__((unused)),
       goto fail;
     }
 
-  if (grub_strcmp (argv[0], "--nounzip") == 0)
-    {
-      argv++;
-      argc--;
-      nounzip = 1;
-    }
-
   if (!argc)
     {
       grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
@@ -429,8 +421,6 @@ grub_cmd_xen_module (grub_command_t cmd __attribute__((unused)),
 
   grub_dprintf ("xen_loader", "Init module and node info\n");
 
-  if (nounzip)
-    grub_file_filter_disable_compression ();
   file = grub_file_open (argv[0]);
   if (!file)
     goto fail;
diff --git a/grub-core/osdep/generic/blocklist.c b/grub-core/osdep/generic/blocklist.c
index 74024fd06..63e0aed35 100644
--- a/grub-core/osdep/generic/blocklist.c
+++ b/grub-core/osdep/generic/blocklist.c
@@ -59,7 +59,6 @@ grub_install_get_blocklist (grub_device_t root_dev,
 
       grub_disk_cache_invalidate_all ();
 
-      grub_file_filter_disable_compression ();
       file = grub_file_open (core_path_dev);
       if (file)
 	{
@@ -117,7 +116,6 @@ grub_install_get_blocklist (grub_device_t root_dev,
 
   grub_file_t file;
   /* Now read the core image to determine where the sectors are.  */
-  grub_file_filter_disable_compression ();
   file = grub_file_open (core_path_dev);
   if (! file)
     grub_util_error ("%s", grub_errmsg);